The 'bare bones' of court cases are in the public domain. (i.e. "Fred Bloggs appeared before Anytown Crown Court on 1st April 2000 and pleaded 'Not Guilty' to a charge of causing grievous bodily harm. He was convicted and sentenced to 18 months imprisonment"). However the records are held by individual courts and are not available online. The details of trials (such as the content of statements) are not freely available to the public.
Police forces are obliged to provide you with a copy of all information held about you (other than where there is a 'public interest' reason not to do so, such as intelligence about a crime which they believe you may have committed and which is still the subject of a current enquiry). There's a maximum fee (which is effectively the standard fee) of £10 for providing the information. The information must be given to you within 40 days of a valid request for it.
The website of the Information Commissioner has general information about obtaining information from public authorities:
http://www.ico.gov.uk...nage/access_info.aspx
but most police forces have specific information (and a relevant request form) available on their websites. Google the following line:
xxxxxxx police "subject access"
replacing xxxxxxx with the name of the relevant force (such as 'Metropolitan' or 'Suffolk')
Chris